Martyr Anodes Collar Anode Magnesium

The Martyr Anodes Collar Anode in magnesium is a sacrificial shaft anode, also called a collar zinc or shaft collar anode. It clamps around a propeller shaft and helps protect underwater metals from galvanic corrosion. Magnesium is the most active of the common anode metals, so these collar anodes are designed for use in fresh water. Many boaters choose magnesium for lake and river use.

Key Features:

• Magnesium construction for sacrificial corrosion protection in fresh water
• Collar style design that mounts directly on the propeller shaft
• Corrodes in place of the shaft, propeller, and other submerged metal parts
• Simple installation with the included mounting hardware design for a secure fit
• Available in multiple collar sizes to match different shaft diameters

Check the anode regularly and replace it once it has eroded significantly. This keeps your drivetrain protected throughout the boating season. Choose the variant that matches your shaft diameter.